I have a rubber "sissy pad" made for the Enfield. It's a perfect fit for the 303s but the screw holes (uses exsisting screws and fits metal but plate) but the holes don't line up on my Ishapore 2a1 (the 762NATO variant) I checked it on the sporterized 303 I traded to my buddy and it fit.
I...
When u r at SMKW don't forget to check the clearance/return barrel. One of my katanas is 1050 carbon steel, hand forged and almost 1/2" thick at the spine with a deep blood groove. I picked it up for under $50 cuz the sheath was missing